https://www.avient.com/resources/safety-data-sheets?page=1708
PERFECT GREY
PERFECT WHITE V2
https://www.avient.com/resources/safety-data-sheets?page=3571
BRONZE OUT KERA PERFECT
BRONZE INN KERA PERFECT
https://www.avient.com/sites/default/files/2020-09/surround-processing-guide-2020.pdf
Furthermore, Surround formulations offer improved performance in the areas of creep and fatigue resistance,
dimensional stability, and surface finish when compared to traditional highly-filled, short fiber formulations.
TEMPERATURE
Material Rear
Center
Front
Nozzle
Melt
Mold
Nylon 6,6
540–570
530–560
530–560
540–570
540–570
200–300
(90–150)
Nylon 6,6
30% SS
540–570
530–560
530–560
540–570
540–570
200–300
(90–150)
PBT
510–410
(265–280)
490–540
(255–280)
480–530
480–530
480–530
150–250
(65–120)
PC
14% NiCF
540–570
540–570
530–560
530–560
530–560
150–250
(65–120)
ABS
470–520
460–520
460–520
460–530
(240–275)
460–530
(240–275)
100–200
(40–90)
PP
440–480
(225–250)
440–480
(225–250)
430–470
(220–245)
420–460
(215–240)
420–460
(215–240)
125–175
(50–80)
DRYING
Material Temperature
°F (°C) Time Minimum
Moisture
Maximum
Moisture
Nylon 6,6
14% NiCF 180 (80) 4–5 hours 0.05% 0.20%
Nylon 6,6
30% SS 180 (80) 4–5 hours 0.05% 0.20%
PBT
14% NiCF 250 (120) 6-8 hours 0.02% 0.03%
PC
14% NiCF 250 (120) 3–4 hours 0.02% 0.02%
ABS
14% NiCF 200 (90) 2–4 hours 0.05% 0.10%
PP
14% NiCF 180 (80) 2–4 hours 0.20% 0.30%
Equipment
• Feed throats smaller than 2.5" may cause bridging due to pellet size
- Larger feed throats will be more advantageous with long fiber EMI shielding resins
• General purpose metering screw is recommended
- Mixing/barrier screws are not recommended
• L/D ratio
- 18:1–20:1 (40% feed, 40% transition, 20% metering)
• Low compression ratio
- 2:1–3:1
• Deep flights recommended
- Metering zone 3.5 mm
- Feed zone 7.5 mm
• Check ring
- Three-piece, free-flowing check ring
• General purpose nozzle (large nozzle tips are recommended)
- Minimum orifice diameter of 7/32"
- Tapered nozzles are not recommended for long fiber EMI shielding resins
• Clamp tonnage:
- 2.5–5 tons/in2
Gates
• Large, free-flow gating recommended
- 0.25" x 0.125" land length
- 0.5" gate depth
Runners
• Full round gate design
• No sharp corners
• Minimum of 0.25" diameter
• Hot runners can be used
PROCESSING
Screw Speed Slower screw speeds are recommended to protect fiber length
Back Pressure Lower back pressure is recommended to protect fiber length
Pack Pressure 60–80% of max injection pressure
Hold Pressure 40–60% of max injection pressure
Cool Time 10–30 seconds (depends on part geometry and dimensional stability)
PROCESS CONSIDERATIONS
Recommended – retain fiber length (maximize conductivity)
• Low shear process
• Low screw speed and screw RPM
• Slow Injection speed
• Fill to 99–100% on first stage of injection
- Reduces potential nesting of fibers at gate location
- Improves mechanical performance near gate location
- Promotes ideal fiber orientation
Resin Rich Surface
• Achieved when using a hot mold temperature and longer cure times
≥ Max mold temperature recommendation
• Improved surface aesthetic
• Reduced surface conductivity
• Could reduce attenuation performance in an assembly
Fiber Rich Surface
• Achieved when using a cold mold temperature and shorter cure times
≤ Minimum mold temperature recommendation
• Improved surface aesthetic
• Reduced surface conductivity
• Could improve attenuation performance in an assembly
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